public MapBlock( CompressedBlock compressed, AdjacencyTable adjacent )
{
//owners = null;
//tree = null;
//leafs = null;
Decompress( compressed, adjacent );
}
public DefaultCompressor( int rx, int ry, int zoom, ProvinceList provinces, AdjacencyTable adjacent, IDMap idmap )
{
this.rx = rx;
this.ry = ry;
this.zoom = zoom;
this.provinces = provinces;
this.adjacent = adjacent;
this.idmap = idmap;
}
public void Decompress( CompressedBlock compressed, AdjacencyTable adjacent )
{
int index = 0;
// Decompress the ID table from the data stream
DecompressIdTable( compressed.Data, ref index, adjacent );
// Decompress the tree from the data stream
int leafcount = DecompressTree( compressed.Data, ref index );
// Create the leaf array
this.leafs = new NodeData[leafcount + (leafcount % 8 == 0 ? 0 : 8-(leafcount % 8))];
// Decompress the ownership table next
DecompressOwnership( compressed.Data, ref index );
// Finally, read the color data, which contains the "color" data for each leaf.
DecompressColorInfo( compressed.Data, ref index );
}
/// <summary>
/// Decompresses the idtable stored in the byte stream.
/// </summary>
/// <param name="data">The byte stream containing the compressed table. </param>
/// <param name="index"></param>
private static int DecompressIdTable( byte[] data, ref int index, AdjacencyTable adjacent, out Pixel[] owners )
{
// -- Get a list of province ids
int idCount = -1;
ushort[] idTable = new ushort[IdTableSize];
do {
++idCount;
idTable[idCount] = (ushort)(data[index] + ((data[index+1] & 127) << 8));
index += 2;
} while ( data[index-1] < Terminator );
++idCount;
// -- Fill the ownertable
owners = new Pixel[IdTableSize];
for ( int i=0; i<idCount; ++i ) {
if ( idTable[i] <= Province.Count ) {
owners[i] = new Pixel( 0, idTable[i] );
}
else {
// We're dealing with a pixel that's on a border. Decode some more...
int val = idTable[i];
int color = val&1;
ushort id1 = (ushort)idTable[((val>>9)&63)-4];
if ( id1 >= Province.Count ) id1 = Province.TerraIncognitaID;
//ushort id2 = adjacent == null ? Province.TerraIncognitaID : adjacent.GetAdjacency( id1, (val>>1)&15 ).ID;
ushort id2 = Province.TerraIncognitaID;
byte riveradj = (byte)((val>>5)&15);
if ( riveradj != Adjacent.Invalid && adjacent != null ) {
id2 = id1;
id1 = adjacent.GetAdjacency( id2, riveradj ).ID;
}
owners[i] = new Pixel( 0, id1, id2, (byte)(color+1) );
}
}
return idCount;
}
public MapBlock( CompressedBlock compressed, AdjacencyTable adjacent )
{
Decompress( compressed, adjacent );
}
public void Decompress( CompressedBlock compressed, AdjacencyTable adjacent )
{
int index = 0;
// Decompress the ID table from the data stream
Pixel[] owners;
int ownercount = DecompressIdTable( compressed.Data, ref index, adjacent, out owners );
// Decompress the tree from the data stream
tree = DecompressTree( compressed.Data, ref index );
int leafcount = tree.CalcLeafCount();
// Create the leaf array
Pixel[] leafs = new Pixel[leafcount + (leafcount % 8 == 0 ? 0 : 8-(leafcount % 8))];
// Decompress the ownership table next
DecompressOwnership( compressed.Data, ref index, leafs, leafcount, owners, ownercount );
// Finally, read the color data, which contains the "color" data for each leaf.
DecompressColorInfo( compressed.Data, ref index, leafs, leafcount );
// Assign the leaf data to the nodes
int leafIndex = 0;
PopulateNode( tree, leafs, ref leafIndex );
}
public CompressedBlock Compress( int xreal, int yreal, int zoom, ProvinceList provinces, AdjacencyTable adjacent, IDMap idmap )
{
// Walk the tree, storing the info along the way
MapBlockHandling.Compressor compressor;
if ( provinces == null || adjacent == null || idmap == null )
compressor = new MapBlockHandling.LesserCompressor();
else
compressor = new MapBlockHandling.DefaultCompressor( xreal, yreal, zoom, provinces, adjacent, idmap );
WalkTree( compressor );
// Write away idtable
int datasize = compressor.IDCount*2 + compressor.Tree.Length + (compressor.LeafCount+3)/4*3;
if ( compressor.IDCount == 2 )
datasize += (compressor.LeafCount+7)/8;
else if ( compressor.IDCount == 3 || compressor.IDCount == 4 )
datasize += (compressor.LeafCount+3)/4;
else if ( compressor.IDCount > 4 && compressor.IDCount <= 16 )
datasize += (compressor.LeafCount+1)/2;
else if ( compressor.IDCount > 16 )
datasize += compressor.LeafCount;
byte[] data = new byte[datasize];
int dataindex = 0;
// Copy IDTable
/*
for ( int i=0; i<compressor.IDCount; ++i ) {
data[dataindex++] = (byte)(compressor.IDTable[i] & 255);
data[dataindex++] = (byte)(compressor.IDTable[i] >> 8);
}
*/
byte[] idtable = compressor.IDTable;
for ( int i=0; i<compressor.IDCount; ++i ) {
for ( int t=0; t<ushort.MaxValue; ++t ) {
if ( idtable[t] == i ) {
data[dataindex++] = (byte)(t & 255);
data[dataindex++] = (byte)(t >> 8);
break;
}
}
}
data[dataindex-1] |= Terminator;
byte[] tree = compressor.Tree;
for ( int i=0; i<tree.Length; ++i ) {
data[dataindex++] = tree[i];
}
if ( compressor.IDCount == 2 ) {
for ( int i=0; i<compressor.LeafCount; i+=8 ) {
data[dataindex++] = (byte)(
(compressor.Owners[i]) |
(compressor.Owners[i+1] << 1) |
(compressor.Owners[i+2] << 2) |
(compressor.Owners[i+3] << 3) |
(compressor.Owners[i+4] << 4) |
(compressor.Owners[i+5] << 5) |
(compressor.Owners[i+6] << 6) |
(compressor.Owners[i+7] << 7) );
}
}
else if ( compressor.IDCount == 3 || compressor.IDCount == 4 ) {
for ( int i=0; i<compressor.LeafCount; i+=4 ) {
data[dataindex++] = (byte)(
(compressor.Owners[i]) |
(compressor.Owners[i+1] << 2) |
(compressor.Owners[i+2] << 4) |
(compressor.Owners[i+3] << 6) );
}
}
else if ( compressor.IDCount > 4 && compressor.IDCount <= 16 ) {
for ( int i=0; i<compressor.LeafCount; i+=2 ) {
data[dataindex++] = (byte)(
(compressor.Owners[i]) |
(compressor.Owners[i+1] << 4) );
}
}
else if ( compressor.IDCount > 16 ) {
for ( int i=0; i<compressor.LeafCount; ++i ) {
data[dataindex++] = (byte)(compressor.Owners[i]);
}
}
// Finally, the 6-bit color values
for ( int i=0; i<compressor.LeafCount; i+=4) {
data[dataindex++] = (byte)((compressor.Colors[i] & 63) | ((compressor.Colors[i+1] & 63) << 6));
data[dataindex++] = (byte)(((compressor.Colors[i+1] & 63) >> 2) | ((compressor.Colors[i+2] & 63) << 4));
data[dataindex++] = (byte)(((compressor.Colors[i+2] & 63) >> 4) | ((compressor.Colors[i+3] & 63) << 2));
}
return new CompressedBlock( data );
}
/// <summary>
/// Decompresses the idtable stored in the byte stream.
/// </summary>
/// <param name="data">The byte stream containing the compressed table. </param>
/// <param name="index"></param>
private void DecompressIdTable( byte[] data, ref int index, AdjacencyTable adjacent )
{
const int IdTableSize = 256;
const int Terminator = 128;
// -- Get a list of province ids
int idCount = -1;
ushort[] idTable = new ushort[IdTableSize];
do {
++idCount;
idTable[idCount] = (ushort)(data[index] + ((data[index+1]&127) << 8));
index += 2;
} while ( data[index-1] < Terminator );
++idCount;
// -- Fill the ownertable
owners = new OwnerInfo[idCount];
for ( int i=0; i<idCount; ++i ) {
if ( idTable[i] < Province.Count ) {
owners[i] = new OwnerInfo( idTable[i] );
}
else {
// We're dealing with a pixel that's on a border. Decode some more...
int val = idTable[i];
int color = val&1;
ushort id1 = (ushort)idTable[((val>>9)&63)-4];
if ( id1 >= Province.Count ) id1 = Province.TerraIncognitaID;
ushort id2 = adjacent == null ? Province.TerraIncognitaID : adjacent.GetAdjacency( id1, (val>>1)&15 ).ID;
owners[i] = new OwnerInfo( id1, id2, (byte)((val>>5)&15) );
}
}
}
